3644641 has 24 divisors (see below), whose sum is σ = 4945472. Its totient is φ = 2613600.

The previous prime is 3644629. The next prime is 3644653. The reversal of 3644641 is 1464463.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3644629) and next prime (3644653).

It is not a de Polignac number, because 3644641 - 2⁷ = 3644513 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3644621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10846 + ... + 11176.

Almost surely, 2^3644641 is an apocalyptic number.

It is an amenable number.

3644641 is a deficient number, since it is larger than the sum of its proper divisors (1300831).

3644641 is a wasteful number, since it uses less digits than its factorization.

3644641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 362 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 3644641 is about 1909.0942878758. The cubic root of 3644641 is about 153.8927825135.

It can be divided in two parts, 364 and 4641, that added together give a palindrome (5005).

The spelling of 3644641 in words is "three million, six hundred forty-four thousand, six hundred forty-one".